package com.example.demo.common;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 登录统一拦截
 */
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session= request.getSession(false);
        if(session!=null&&session.getAttribute(Constant.SESSION_USERINFO_KEY)!=null){
            return true;
        }

        response.setStatus(401);//没有权限---因为没有登录
        return false;
    }
}
